AutoCodes – Cadillac – P1FF1 Cadillac

P1FF1 Cadillac Code - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Performance

Quick Answer

The hybrid battery contains 192 individual cells. Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1FF1 Cadillac indicates Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Performance.
Common causes: Common causes include Faulty Hybrid/EV Battery Interface Control Module, Hybrid/EV Battery Interface Control Module harness is open or shorted, Hybrid/EV Battery Interface Control Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 893

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1FF1 Cadillac Description

The hybrid battery contains 192 individual cells. Two cells are welded together in parallel and called a cell group. There are a total of 96 cell groups in the hybrid battery assembly. These cell groups are electrically connected in series. Each individual cell group is rated at 3.7 V, for a nominal system voltage of 355 V direct current. The battery cell groups are joined to form 3 distinct sections. The first 24 battery cell groups make up battery section 1. This section is adjacent to the cowl and contains battery cell groups 73 through 96. The next 28 battery cell groups make up battery section 2. This section is located behind section 1 and contains battery cell groups 45 through 72. The transverse battery section is section number 3 and it contains the remaining 44 battery cell groups 1 through 44. The battery sections also contain two temperature sensors, with one sensor located at each end of the section.
The battery energy control module monitors the voltage of the 96 battery cell groups. The voltage sense lines are attached to each individual cell group, and these sense lines terminate at a connector located on the top surface of the battery section. A voltage sense harness joins this connector to the battery energy control module.
The battery energy control module contains internal interface control modules that monitor specific cell groups.
The battery energy control module will determine when a fault condition is present. Diagnostics and system status are communicated from the battery energy control module to the hybrid powertrain control module 2 through serial data. The hybrid powertrain control module 2 is the host controller for diagnostic trouble code information.

OBDII Code P1FF1 Cadillac - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Performance - AutoCodes.com — P1FF1 Cadillac Code - Hybrid/EV Battery Interface Control Module 9 Voltage Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P1FF1 Cadillac?

Faulty Hybrid/EV Battery Interface Control Module
Hybrid/EV Battery Interface Control Module harness is open or shorted
Hybrid/EV Battery Interface Control Module circuit poor electrical connection

How to Fix the DTC P1FF1 Cadillac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1FF1 Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1FF1 Cadillac Code

1. What are common symptoms of OBDII code P1FF1 in a Cadillac Hybrid/EV vehicle?

- Common symptoms include poor hybrid system performance, reduced fuel efficiency, and potential warning lights on the dashboard related to the battery system.

2. What are possible causes of the P1FF1 code in a Cadillac Hybrid/EV vehicle?

- Possible causes include a faulty Hybrid/EV Battery Interface Control Module 9, issues with the voltage sensor, damaged wiring or connectors, or a failing hybrid battery.

3. How can I diagnose the P1FF1 code in my Cadillac Hybrid/EV vehicle?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific fault code, checking the voltage sensor readings, inspecting wiring for damage, and testing the battery performance.

4. What repairs are commonly needed to resolve the P1FF1 code in a Cadillac Hybrid/EV vehicle?

- Repairs may involve replacing the Hybrid/EV Battery Interface Control Module 9, repairing or replacing damaged wiring or connectors, and potentially replacing the hybrid battery if necessary.

5. Can I continue driving my Cadillac with the P1FF1 code present?

- It is not recommended to continue driving with the P1FF1 code present, as it can lead to further damage to the hybrid system and potentially result in a breakdown. It's best to address the issue promptly.

6. Are there any safety concerns associated with the P1FF1 code in a Cadillac Hybrid/EV vehicle?

- While the P1FF1 code itself may not pose an immediate safety risk, unresolved issues with the hybrid system could potentially lead to unexpected power loss or other safety hazards while driving.

7. How can I prevent the P1FF1 code from reoccurring in my Cadillac Hybrid/EV vehicle?

- Regular maintenance and inspections of the hybrid system, including checking the battery health and monitoring voltage sensor readings, can help prevent the recurrence of the P1FF1 code.

8. Is it possible to reset the P1FF1 code in a Cadillac Hybrid/EV vehicle without repairing the underlying issue?

- While it is possible to clear the code temporarily, it will likely reappear if the root cause of the issue is not addressed. It's important to diagnose and repair the problem to prevent further issues.

9. Can I attempt to repair the P1FF1 code in my Cadillac Hybrid/EV vehicle myself?

- Repairing the P1FF1 code may require specialized knowledge and tools related to hybrid vehicle systems. It is recommended to seek assistance from a qualified technician or dealership for proper diagnosis and repair.